Screenshots
Watch trailer on Steam ↗BastionOS
Feral Paw · Published by Feral Paw · Official site ↗
Very Positive — 97% positive (182 reviews) · 52 achievements
Last updated 28 Sept 2026
A short active incremental game where you stack ludicrous weapons and upgrades onto a tower. Destroy a gigantic evolving horde, unlock new tech, repeat.
£2.81
Lowest price we've ever recorded
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Price history
Action, Indie, Simulation, Strategy, Casual · 2026 · More under £5 games
Manage and upgrade a tower to fend off an ever-changing horde in BastionOS. This indie simulation experience challenges you with strategic weapon stacking as you explore the unique gameplay of Feral Paw’s 2026 release.
About this game
//Select a level, and aim your tower's artillery towards incoming enemies. BOOM! Grab any precious resources the enemies drop.
//The tower will inevitably fall. Under your command, it will rise even stronger. Fortify your tower with weapons and upgrades.
//Research new and increasingly powerful tech.
//Defend the Bastion until the end. You and your weapons research program are the last line of defense against the machine army. There's no telling if this reckless operation will allow Humanity to survive. What will happen when the horde becomes insurmountable?
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10 (64-bit)
- Processor: 2.0 GHz
- Memory: 4 GB RAM
- Graphics: GPU with basic DirectX 11 support
- DirectX: Version 11
- Storage: 200 MB available space
Recommended
- Requires a 64-bit processor and operating system
- OS: Windows 10 (64-bit)
- Processor: 2.0 GHz
- Memory: 4 GB RAM
- Graphics: GPU with basic DirectX 11 support
- DirectX: Version 11
- Storage: 200 MB available space
Supported Languages
Latest news
Patch NotesOfficial
Patch 1.0.1d
Set max collection caps for resources. Added an extra internal step for checking achievements, in case they didn't register the first time. Added some clarifying labels and icons to tabs and setting screen. Added an option in settings to toggle camera rotation during gameplay. Fixed some typos.Read full article on Community Announcements (Feral Paw)Patch NotesOfficial
First Day Patch
Hello everyone, First of all, thank you all who have played the game. In this update we have fixed the Professor achievement, you should have it when you launch the game, if you have completed the Task for it. Also fixed several visual bugs and whatnot. Thanks againRead full article on Community Announcements (Feral Paw)AnnouncementsOfficial
BastionOS is available NOW with a 40% Release Discount
BastionOS is now available on Steam, with a whopping 40% discount, so that you don't have to wait for a sale. Look at all these features:Destroy GIGANTIC machine hordesUnlock a HUMONGOUS skill tree with 170+ nodesStupid & stupid fun weapons to lay waste to your enemies3-4 hours of solid gameplay, with constant new upgrades, weapons, and systems to unlock. All killer no filler gamer actionChill OSTBadass endingWe hope you have a great time. Thank you for playingRead full article on Community Announcements (Feral Paw)AnnouncementsOfficial
Demo version 1.1c
This update we have:Tons of visual additions and improvements, including updated research screen, damage info during gameplay, enemy types, and post processing (customizable in settings) Added localisation for Japanese, Simplified Chinese, Brazilian Portuguese, and Turkish Fixed damage and health output's flat vs percentage calculation (whoops) Various background fixes Keep in mind that saves are reset to ensure everything works properly.Read full article on Community Announcements (Feral Paw)AnnouncementsOfficial
Demo version 1.1b
We have made some changes to our demo. Limited FPS to 60 Rebalanced level progression, weapon/enemy stats, and resource distribution for a smoother experience Made resource collection range clearer Added tooltip to Augments menu Added an artillery cooldown and contact time indicator on crosshair. Can be toggled on and off Changed missile launcher Elite attack timing Changed some textFixed some minor UI bugsRead full article on Community Announcements (Feral Paw)
